XAUTILirt-E. 
361 
Bliimeubach described them as “ SejniU'u^n rostra,’’ Schlolhcim as 
Lepaftiti^s ' , and Bronn used Blaiiiville's name Rhtincliohiluis, while 
Blainville founded the genus Concorlujnchas for the winged, lower 
mandibles, which were subsequently proved to belong to Temno- 
cheihis [“ Xautihis ”] hidorsatus. Later still d’Orbigny established 
the genera Palteoteuthis and Bhi/ncoteutJus~, with brief descriptions, 
but no figures. Bellardi^ described a fossil beak from the Miocene 
Tertiary of Piedmont under the name of ScajjtorrJn/nchus and 
attributed it to a Decapod ; but Prof. Dr. von Zittcl suggests that 
it may have belonged to an Aturia'^. He also points out ’ that the 
opercula of Xeritopsis have been mistaken by some authors for the 
beaks of Cephalopods and have been described as such. 
Thus, Bolle® described the operculum of Xtrif apsis moniliformis 
of the Miocene of Lapugy (Siebenbiirgen), under the name Cii- 
clitlia, and the name Rhi/nchidia was bestowed by Laube upon the 
opercula of Xeritopsis. Peltarion, Deslongcliamps {^Scaphanidia, 
Ptolle supposed by that author to have been one of the beaks of a 
Cephalopod, w[is also shown by M. J. Beandoiiin ^ to be the operculum 
of a Xtritopsis ; and the Chiton Rhcetinis of Moore ® lias similar 
affinities. The Rlnjncholithus Buchi, Miiller (Monographie der 
Petref. der Aachener Kreideforrnation, Abth. ii. 1851, p. GO, tab. 
vi. figs. 13, A, B, C), may be added also to this list. 
Buckland and Mantell ajipear to be the only authors who have 
figured Rhyncholites from the British rocks. Morris’" merely states 
that “ these bodies [Rhyncholites] have been found in the Lias, 
Lyme Regis, and Lower Cl.alk, Dover, Kent,” but he gives no 
references to any writings concerning them. 
* Supposing them to be the opercular valves of a Balanus. Petrefacteukunde, 
1820, p. 109. 
^ Prodrome de Paleont. Stratigraphique, 1849, vol. i. p. 327. 
^ I Mollusclii dei Terreni Terziari del Piemonte e della Liguria, 1872, pt. i. 
p. 12, tav. i. figs. 2, a-c. 
* Ilandbuch der Palajoutologie, Band i. Abth. ii. Lief. iii. 1884, p. 387- 
® Loc. cit. Lief. ii. 1882, pp. 202, 203. 
® LTeber eine neue Cepbalopoden-Gattung aus den Tertiarschichten von 
Siebenburgen,” Sitzungsber. d. k.-k. Akad. 1802, Band xlv. p. 119. 
Loc. cit. p. 127. 
** Bull. Soc. Geol. de France, ser. 2, vol. xxvi. p. 182. 
® Quart. Journ. Geol. Soc. 1861, vol. xvii. p. 511, pi. xvi. ff. 28, 29. 
Bridgewater Treatises —Geology and Mineralogy, 1837, vol. i. p. 319; vol. 
ii. p. 53, pi. xxxi. figs. 5, 6. 
“Medals of Creation,” 1844, vol. ii. p. 478, ‘Beaks Nautilus,' Ch-aW 
Marl, woodcut 105, figs. 1, la, \h. 
Cat. British Fossils, 2nd ed. 1854, p. 313. 
